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Endo‐ and Exocyclic Substitutions in α ‐P 4 S 3 I 2
Author(s) -
Hepp Alexander,
Blachnik Roger
Publication year - 1999
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/(sici)1522-2675(19991215)82:12<2425::aid-hlca2425>3.0.co;2-1
Subject(s) - chemistry , electronegativity , sulfur , coupling constant , selenium , chemical shift , ligand (biochemistry) , nuclear magnetic resonance spectroscopy , stereochemistry , computational chemistry , crystallography , organic chemistry , biochemistry , physics , receptor , particle physics
Two isomers each of α ‐P 4 S 2 SeX 2 and α ‐P 4 SSe 2 X 2 (X=Cl, Br) have been identified by 31 P‐NMR spectroscopy in mixtures obtained from thermal reaction of PX 3 and P 4 S 1.4 Se 1.6 . Systematic changes in chemical shifts and coupling constants with electronegativity of the ligand by exocyclic substitution and with alteration of the molecular geometry by the replacement of sulfur by selenium are reported.